My heart is breaking

I have been cramping all day, but didn't think anything about it until I just went to the bathroom and wiped blood. It also had a tiny bit of tissue in it. I know I might not be miscarrying, but might as well prepare for the worst. I'm heartbroken. My fiancé is trying to make me feel better by saying how common bleeding is in early pregnancy and started talking about implantation bleeding. I told him we've already seen the sac and yolk, it has implanted all ready. He's trying, but he's just pissing me off. Just shut up. On Wednesday it measured 5w4d which was the exact length of time since I ovulated and we had sex. I was 6 weeks today.